public-transport/gtfs-utils

sort.sh needs too much memory

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#34 opened on Mar 22, 2021

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Description

Because of #27, I switched to Miller, but it just needs too much memory to sort the CSV files.

I aborted sorting stop_times.txt of the 2021-03-19 DELFI dataset after 1h and >12gb of memory usage.

Are there more efficient tools that can sort CSV files?

Contributor guide

Research direction
Research efficient sorting algorithms for large CSV files, such as external merge sort or using tools like 'sort' with key options. Evaluate memory usage of different approaches.
Tech stack
javascript
Domain
backend
Issue type
Performance
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-2 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
Git
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
40